cl.apr.pdf.chart.BarChartAviso.java Source code

Introduction

Here is the source code for cl.apr.pdf.chart.BarChartAviso.java

Source

/*
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package cl.apr.pdf.chart;

import cl.apr.beans.BarChartItem;
import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Paint;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.List;
import org.jfree.data.category.DefaultCategoryDataset; /* We will use this dataset class to populate data for our bar chart */
import org.jfree.chart.ChartFactory; /* used to create a chart object */
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.ChartUtilities; /* We will use this class to convert the chart to a PNG image file */
import org.jfree.chart.StandardChartTheme;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.chart.renderer.category.CategoryItemRenderer;

/**
 *
 * @author hmardones
 */
public class BarChartAviso {

    static private Paint[] colors = new Paint[] { Color.red, Color.blue, Color.green, Color.yellow, Color.orange,
            Color.cyan, Color.magenta, Color.blue };

    public static BufferedImage crearBarchart(List<BarChartItem> barChartItems) {
        BufferedImage bi = null;
        try {

            ChartFactory.setChartTheme(StandardChartTheme.createJFreeTheme());
            //ChartFactory.setChartTheme(StandardChartTheme.createDarknessTheme());

            /* Step - 1: Define the data for the bar chart  */
            DefaultCategoryDataset my_bar_chart_dataset = new DefaultCategoryDataset();
            int i = 0;
            for (BarChartItem barChartItem : barChartItems) {
                if (barChartItem.getNombre().equals("-")) {
                    my_bar_chart_dataset.addValue(barChartItem.getValor(), "serie", (++i) + "");
                } else
                    my_bar_chart_dataset.addValue(barChartItem.getValor(), "serie", barChartItem.getNombre());
            }
            //                my_bar_chart_dataset.addValue(34, "mes", "Ene");
            //                my_bar_chart_dataset.addValue(25, "mes", "Feb");
            //                my_bar_chart_dataset.addValue(22, "mes", "Mar");
            //                my_bar_chart_dataset.addValue(12, "mes", "Abr");
            //                my_bar_chart_dataset.addValue(40, "mes", "May");
            //                my_bar_chart_dataset.addValue(30, "mes", "jun");
            //                my_bar_chart_dataset.addValue(2, "mes", "Jul");
            //                my_bar_chart_dataset.addValue(15, "mes", "Ago");

            /* Step -2:Define the JFreeChart object to create bar chart */
            //JFreeChart chart=ChartFactory.createBarChart("Detalle de sus consumos","","MT3",my_bar_chart_dataset,PlotOrientation.VERTICAL,true,true,false);    
            JFreeChart chart = ChartFactory.createBarChart("", "", "MT3", my_bar_chart_dataset,
                    PlotOrientation.VERTICAL, true, true, false);

            //chart.setBackgroundPaint(Color.lightGray);
            // get a reference to the plot for further customisation... 
            final CategoryPlot plot = chart.getCategoryPlot();
            CategoryItemRenderer renderer = new CustomRenderer();

            renderer.setSeriesPaint(0, Color.DARK_GRAY);

            plot.setRenderer(renderer);
            plot.setBackgroundPaint(Color.white);

            chart.setBorderVisible(false);
            chart.setBackgroundPaint(Color.white);
            chart.setBorderStroke(null);
            chart.getLegend().visible = false;
            /* Step -3: Write the output as PNG file with bar chart information */
            int width = 480; /* Width of the image */
            int height = 250; /* Height of the image */
            bi = chart.createBufferedImage(width, height);

            /*
                
            File BarChart=new File("output_chart.png");              
            ChartUtilities.saveChartAsPNG(BarChart,BarChartObject,width,height); 
                    */
        } catch (Exception i) {
            System.out.println(i);
        }

        return bi;
    }

}

class CustomRenderer extends BarRenderer {
    private Paint[] colors;

    public CustomRenderer() {
        this.colors = new Paint[] { Color.red, Color.blue, Color.green, Color.yellow, Color.orange, Color.cyan,
                Color.magenta, Color.blue };
    }
    /*
    public Paint getItemPaint(final int row, final int column) 
    { 
    // returns color for each column 
    return Color.gray;
    //return (this.colors[column % this.colors.length]); 
    } */
}